GitHub #292 Move BackendRegistry.hpp to the public API

 * Moved to BackendRegistry.hpp include/armnn
 * Updated makefiles and sources accordingly

Signed-off-by: Matteo Martincigh <matteo.martincigh@arm.com>
Change-Id: I4d83abb581d523218a880c879fcf30c9611f7fd7

1 files changed, 61 insertions, 0 deletions

diff --git a/include/armnn/BackendRegistry.hpp b/include/armnn/BackendRegistry.hpp
new file mode 100644
index 0000000000..82e59d970b
--- /dev/null
+++ b/include/armnn/BackendRegistry.hpp
@@ -0,0 +1,61 @@
+//
+// Copyright © 2017 Arm Ltd. All rights reserved.
+// SPDX-License-Identifier: MIT
+//
+#pragma once
+
+#include <armnn/Types.hpp>
+#include <armnn/BackendId.hpp>
+
+#include <memory>
+#include <unordered_map>
+#include <functional>
+
+namespace armnn
+{
+
+class IBackendInternal;
+using IBackendInternalUniquePtr = std::unique_ptr<IBackendInternal>;
+
+class BackendRegistry
+{
+public:
+    using PointerType = IBackendInternalUniquePtr;
+    using FactoryFunction = std::function<PointerType()>;
+
+    void Register(const BackendId& id, FactoryFunction factory);
+    bool IsBackendRegistered(const BackendId& id) const;
+    FactoryFunction GetFactory(const BackendId& id) const;
+    size_t Size() const;
+    BackendIdSet GetBackendIds() const;
+    std::string GetBackendIdsAsString() const;
+
+    BackendRegistry() {}
+    virtual ~BackendRegistry() {}
+
+    struct StaticRegistryInitializer
+    {
+        StaticRegistryInitializer(BackendRegistry& instance,
+                                  const BackendId& id,
+                                  FactoryFunction factory)
+        {
+            instance.Register(id, factory);
+        }
+    };
+
+protected:
+    using FactoryStorage = std::unordered_map<BackendId, FactoryFunction>;
+
+    // For testing only
+    static void Swap(BackendRegistry& instance, FactoryStorage& other);
+
+private:
+    BackendRegistry(const BackendRegistry&) = delete;
+    BackendRegistry& operator=(const BackendRegistry&) = delete;
+
+    FactoryStorage m_Factories;
+};
+
+BackendRegistry& BackendRegistryInstance();
+
+} // namespace armnn